/Engine/Plugins/Experimental/PhysicsControl/Source/PhysicsControl/Public/PhysicsControlComponent.h
Adds a BodyModifier to a Set. This will add a new set if necessary. For example, you might make a set of body modifiers called "Feet" by calling this twice, passing in the left and right foot body modifiers.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=PhysicsControl) void AddBodyModifierToSet ( [FPhysicsControlNames](API\Plugins\PhysicsControl\FPhysicsControlNames) & NewSet, const [FName](API\Runtime\Core\UObject\FName) BodyModifier, const [FName](API\Runtime\Core\UObject\FName) Set )